Automatic steam-feed and piston-rod support.



WE VAN DER LEAST.

AUTO-.TIG STEAM-FEED AND PISTON RGD APPLICATION FILED Auml, 19u.

SUPPORT.

Patented Oct. 29, 1912.

y N d NVE ofml n my manners 'UNITED STATES PATENT orrrcn 'WLLIAM VAN DER LEAST, OF LAONA, WISCONSIN.

AUTOMATIC sTEAM-FEEnAND PIsToN-Ron SUPPORT.

Be it known that I, WILLIAMl VAN DER LEAST, a citizen of the United States, and

and Combinations of parts, hereinafter dea cap 13, secured in and a disk Olhead scribed and claimed.

The object of the invention is to provide a device of the character specified for use in the steam feed cylinder, for sup-porting the piston rod to prevent sagging and consequent wear on the packingsk and loss of power. v 1

Referring to the drawings forming a part hereof, Figure 1 is a longitudinal section of a cylinder provided with the improvement. Fig. 2 is a section of the cylinder at right angles to Fig. 1, and, Fig. 3 is a section on the line 3 3 of Fig. 2.

The device-isl used in saw mills wherein the log Carriage isconnected with the piston -rod of the steam feed cylinder for supporting the said rod. The cylinder` 1 of suitable length, and cross section, and the piston 2 is slidable in the cylinder.

The ends of the cylinder-*are closed by heads 3 and 4, and thehead 3 is provided with an opening for the rod 5, and the rod is encircled by a packing nut 6. The heads are heldin place by cap screws 7. A collar 8 encircles the rod 5 within the cylinder, and a spring 9 encircles the hub 10 ofthe collar.

The collar is provided with a plurality of openings 11 to permit the passage of fluid, to equalize the pressure on both sides thereof, and the periphery of the collar lits smoothly the .inner surface of the cylinder, while the piston rod fits the bore of the hub of the collar. The collar au?. thus to support the rod, and the spring spaces the collar from the piston. The means for holding the ring ispreferably arranged at the central portion of the main cylinder, and is composed in part of nipples 12 extending in opposite directions from the said-named cylinder.

Each nipple is closed -at its outer end by place by cap sc ews 14, 15 iS slidable in each Specication of Letters Patent.

vbranch 26 leads rand opens into the outer end of the vgage and hold the collar.

traversing an opening 19 in the wall of the main cylinder, and extending into the interior thereof. The hubs are hollow as shown at 20, and the opening 20 extends through the disk or head, to admit fluid behind the head, to equalize the pressure on the same. The inner end of each hub is beveled in opposite directions as shown at 21, and the said ends are adapted toi be engaged by the collar S before mentioned. The main piston 2, and the heads 15 are provided with the usual Huid-tight packing rings 22.

A T 23 is arranged at .one side of the cylinder near the nipples 12, and the lateral branch of the T is connected with the interior of t-he cylinder by a pipe 24. A from each end of the T,

adjacent nipple. A similar T127 is arrangedv at the opp'osite side of the cylinder. and the .lateral branch'ot' the T is connected to the inlet pipe 29 of the main cylinder. by a pipe 30. The ends of the Tv 27 are Connected with the inner ends of the nipples by pipes 23. The lcylinder is also provided with a steam pipe 31, at the opposite end from the pipe 29, and the outward movement of the heads 15 is limited' by theI stops or lugs 32, before mentioned. The guide rods 16 in addition to guiding the heads prevents their rotation, and holds the hubs with their beveled edges in the posi tion shown in Fig. 2.

The hub 10 of the. collar extends toward the piston, and the spring and hub space the ring from the piston, so that after the piston passes the hubs 18 of the heads, they are forced inwardlyA to cause the hubs 1S'to en- The collar is thus retained at the center of the cylinder on the inward stroke ofthe piston, and supports 'the rod at approximatelyv its center. On

the outward stroke of the piston, the piston engages the collar, after the lsaid piston passes the hubs 18, and carries the collar to the position indicated in Fig. 1. The motive fluid passes behind the heads or to their outer faces, through the bore 20 of the heads, and through the pipes 24 and' 26. The

. PatentedOct. 29, 1912. application filed naroh'i, 1911. serial No. 611,624.

nica-,ns Vfor prevent-ing rotation of the l ment the head to limit the inward me ej nient ci the hubs, guides for the heads, 'ng

meansfcomprising pipes for admittin ino-tive vfluidto; the outer ends of the nipples and openings through the hubs, the outer facesof'the heads being of greater area than 'the inner faces to cause the motive tluidto normally press the heads ir.- wardly. j

@VA device of the character specified, comprising in combination with the cylinder, the piston movable therein, and the red connected with the piston extending out of the cylinder at one. end, of a ring slidable on the' rod and engaging the inner surface of the cylinder with its edge, said ring having a hub extending toward the piston and having transverse openings, a spring between the piston and the ring, and means for holdf ing the ring' at the longitudinal center of the cylinder when the piston moves toward the opposite end from the end through which the rod extends, said means comprising oppositely extending nipples, at the longitndinal center of the cylinder and communicating therewith, a head, movable in each nipple and having a hub extending into the cylinder, the inner end of cach hub being beveled in opposite directions, the nipples being reducedV near their inner ends to form a shoulder 'for engagement by the headto limit tie inward movementci the hubs, guides-for the heads, moins for preventing roiv ation of the heads, and means for admit-- ting the n'zotive id to bothrfaces of each head. v

f3, A@ device of the character specified, comprising in combination with the cylin der, the piston movable therein, and the red conn-@ted with the piston extending out of the cylinder at one end, of a ring slidable on the rod and engaging the inner surface of the cylinder with its edge, said ring having a hub extending toward the pis-ton and having transverse openings, a spring belive-.en the piston and the ring, and means for holding the ring at the longitudinal center o l the cylinder when the piston moves toward the opposite end from the end through which the rod extends, said means comprising oppositely-extending nipples 'at the. centcr of the cylinder, a head movable in each nipple, each head having a hub ext-ending in'o the cylinder, saidhub having its inner gi/veled toward the opposite ends of the cvaiailer, means .for limiting the inward' the cylinder at one end, of a ring slidable on the rod and vengaging the inneil ri'ace et' the cylinder' with its edge, said ring Lef/'lng a hub extending toward the piston and having transverse openings, a spring between thepiston and the ring, and means for hold,- the ring at the longitudinal center ot the cylinder when the piston'moves toward the opposite end from the end-through which the rod extends,said means comprising oppositely extending. nipples at the center of the cylinder, a head movable in each ni pple, each head having a hub extending into the cylinder, said hub having itsinner end bev` tied toward the opposite ends. of the cylinder, means for preventing rotation of the motive fluid-to the outer faces of the heads.

prising in combination with the cylinder, the piston movable therein and the rod con nected with the piston extending out of the cylinder at one end, of a ring slidable on the rod and engagingthe inner surface of the cylinder with its edge, said ring having la hub extending toward the piston and having tansverse openings, aY spring beior holding the ring at the longitudinal center of the cylinder when the' piston moves toward the opposite end from the end through which the rod extends, said means comprising in each nipple, each head having hub eX.- tendmg into the cylmder, said hun having its inner end beveled toward tl'e opposite ing an excess ot motive fluid to the outer faces otl the heads.

6. ln combination with the cylinder, the piston and the piston rod, ot' .a 'supporting ring having transversil openings and encircling thc r'id and litting the inner face et the cylinder, means for spacing the ring from the piston, and means for holding the ring at the longitudinal center ol the cylinder vwhen the piston moves inwardly, said means canzprising oppositely extending nipples on the cylinder, a head in each nipple having a hub extending into the cylinder, means 't'or supplying an excess ot' motive fluid to the outer faces ot' the heads, means for preventing rotation oi" the heads, means for guiding the heads, and means for limiting their invard movement.

7. ln combination with the cylinder, the piston and the. piston rod, ot' a supporting ring ha ving t'ansverse openings and encircling the rod and fitting the inner tace of the cylinder, means t'or spacing' the ring from the piston, and means" for holding the ring at the longitudinal center of the. cylinder when the piston moves inwardly, said means comprising oppositely extending nip- 5. A device'of the character specified con1.

oppositely extending nipples at' the center ot' thc cylinder, a head movable heads, and means for supplying an excessof tween the piston and the ring, .and means i ends of the cylinder, and means fer supplyfimf longitudmd Center of the cylin- E dei: whom the Instan moves mwargily, sind msnm.: wimgllslug opposll'ely exiicl'ldmg lup- 'dem' :nml nieuwe, 'im' Kwantum umtwn aff ih@ he; :.i.

XVM. VAN nlm LEAS'L 1 Dm; STAD, SL11* a' mur. 

